The design of the current study of adolescents is that of a randomized controlled trial (RCT) with two parallel groups (control and experimental), with the question of the independent variable 'group effect' on two dependent measures (adolescent physical growth and cognitive development). In addition to group status, the contribution of four additional independent measures on outcome will also be evaluated: Parent socioeconomic status, parent cognitive function, adolescent physical function and adolescent psychosocial function. The outcome examiners will be blind to subject group status throughout. The design assures a true experimental test of the NICU intervention effects in adolescence.